Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Synthesis method of low-sensitivity polycarboxylic acid mother liquor
The invention relates to a synthesis method of a low-sensitivity polycarboxylic acid mother liquor, which comprises the following steps: (1) solution preparation: preparing a kettle bottom solution byadding water into a reaction kettle, starting the reaction kettle, stirring, and adding a polycarboxylic acid macromonomer EPEG3000 and acrylic acid I, preparing a solution I by dissolving acrylic acid II, hydroxyethyl acrylate and methyl acrylate into water, and preparing a solution II by dissolving a reducing agent and a chain transfer agent into water; and (2) adding an oxidizing agent into the kettle bottom solution, uniformly stirring, starting to dropwise add the solution II at a constant speed, dropwise adding the solution I after 0-5 minutes, and controlling the time when the solutionII is completely dropwise added to be 10-30 minutes later than the time when the solution I is completely dropwise added, performing curing for 30-90min, releasing cooling water for cooling in the reaction process to control the temperature to be lower than 30 DEG C, adding alkali for adjusting, and uniformly mixing to obtain the low-sensitivity polycarboxylic acid mother liquor. According to theinvention, the polycarboxylic acid macromonomer EPEG3000 is adopted to synthesize a polymer with a low acid-ether ratio under a low-temperature condition, and the acrylate is introduced in the process, so that the prepared polycarboxylic acid mother liquor has the characteristics of moderate water reducing rate and slump retaining property, and the problem of high sensitivity of the common carboxylic acid mother liquor is solved.
本发明涉及低敏感度聚羧酸母液的合成方法，步骤如下：（1）溶液配制：釜底溶液配制：在反应釜中加水开机搅拌，投入聚羧酸大单体EPEG3000和一号丙烯酸；一号溶液配制：将二号丙烯酸、丙烯酸羟乙酯和丙烯酸甲酯溶于水；二号溶液配制：将还原剂和链转移剂溶于水；（2）向釜底溶液中加入氧化剂搅匀后，开始匀速滴加二号溶液，0min‑5min后滴加一号溶液，控制二号溶液比一号溶液晚10min‑30min滴完；熟化30min‑90min，反应过程中开冷却水降温控制温度低于30℃，加碱调节混匀得到低敏感型聚羧酸母液。本发明在低温条件，采用聚羧酸大单体EPEG3000合成低酸醚比的聚合物，过程中引入丙烯酸酯，由此制备的聚羧酸母液，具有减水率和保坍性适中的特点，解决常用的羧酸母液敏感度高的问题。
Synthesis method of low-sensitivity polycarboxylic acid mother liquor
The invention relates to a synthesis method of a low-sensitivity polycarboxylic acid mother liquor, which comprises the following steps: (1) solution preparation: preparing a kettle bottom solution byadding water into a reaction kettle, starting the reaction kettle, stirring, and adding a polycarboxylic acid macromonomer EPEG3000 and acrylic acid I, preparing a solution I by dissolving acrylic acid II, hydroxyethyl acrylate and methyl acrylate into water, and preparing a solution II by dissolving a reducing agent and a chain transfer agent into water; and (2) adding an oxidizing agent into the kettle bottom solution, uniformly stirring, starting to dropwise add the solution II at a constant speed, dropwise adding the solution I after 0-5 minutes, and controlling the time when the solutionII is completely dropwise added to be 10-30 minutes later than the time when the solution I is completely dropwise added, performing curing for 30-90min, releasing cooling water for cooling in the reaction process to control the temperature to be lower than 30 DEG C, adding alkali for adjusting, and uniformly mixing to obtain the low-sensitivity polycarboxylic acid mother liquor. According to theinvention, the polycarboxylic acid macromonomer EPEG3000 is adopted to synthesize a polymer with a low acid-ether ratio under a low-temperature condition, and the acrylate is introduced in the process, so that the prepared polycarboxylic acid mother liquor has the characteristics of moderate water reducing rate and slump retaining property, and the problem of high sensitivity of the common carboxylic acid mother liquor is solved.
本发明涉及低敏感度聚羧酸母液的合成方法，步骤如下：（1）溶液配制：釜底溶液配制：在反应釜中加水开机搅拌，投入聚羧酸大单体EPEG3000和一号丙烯酸；一号溶液配制：将二号丙烯酸、丙烯酸羟乙酯和丙烯酸甲酯溶于水；二号溶液配制：将还原剂和链转移剂溶于水；（2）向釜底溶液中加入氧化剂搅匀后，开始匀速滴加二号溶液，0min‑5min后滴加一号溶液，控制二号溶液比一号溶液晚10min‑30min滴完；熟化30min‑90min，反应过程中开冷却水降温控制温度低于30℃，加碱调节混匀得到低敏感型聚羧酸母液。本发明在低温条件，采用聚羧酸大单体EPEG3000合成低酸醚比的聚合物，过程中引入丙烯酸酯，由此制备的聚羧酸母液，具有减水率和保坍性适中的特点，解决常用的羧酸母液敏感度高的问题。
Synthesis method of low-sensitivity polycarboxylic acid mother liquor
一种低敏感度聚羧酸母液的合成方法
WANG XIAOPING (Autor:in) / DENG YUNHUI (Autor:in) / ZHAO GUANGHE (Autor:in) / DONG HAIBO (Autor:in) / ZHOU XUEPING (Autor:in) / CHEN CHANGXING (Autor:in) / WANG HE (Autor:in) / PEI JUNPENG (Autor:in) / MIAO TONG (Autor:in) / ZHOU DAPENG (Autor:in)
04.09.2020
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2020
Preparation method of polycarboxylic acid slump retaining mother liquor
| Europäisches Patentamt | 2024
Polycarboxylic acid slump retaining mother liquor and preparation method thereof
| Europäisches Patentamt | 2024
Polycarboxylic acid slow-release mother liquor and preparation method thereof
| Europäisches Patentamt | 2024
Mud-resistant polycarboxylic acid water reducer mother liquor and preparation method thereof
| Europäisches Patentamt | 2021